﻿using System;
using System.Xml.Serialization;

namespace my_work
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            var i = 10;
            if(i>5)
            {
                Console.WriteLine("真的");
            }
            else
            {
                Console.WriteLine("假的");
            }


            var v = 60;
            if(v/10>=10)
            {
                Console.WriteLine("优秀");
            }
            else if(v/10>=9)
            {
                Console.WriteLine("优秀");
            }
            else if(v / 10 >= 8)
            {
                Console.WriteLine("良好");
            }
            else if (v / 10 >= 7)
            {
                Console.WriteLine("合格");
            }
            else if (v / 10 >= 6)
            {
                Console.WriteLine("合格");
            }
            else
            {
                Console.WriteLine("不合格");
            }
            Console.WriteLine("请输入学生成绩（0~100的整数）");
            int points = 50;
            switch(points/10)
            {
                case 10:
                    Console.WriteLine("优秀");
                    break;
                case 9:
                    Console.WriteLine("优秀");
                    break;
                case 8:
                    Console.WriteLine("良好");
                    break;
                case 7:
                    Console.WriteLine("合格");
                    break;
                case 6:
                    Console.WriteLine("合格");
                    break;
                default:
                    Console.WriteLine("不合格");
                    break;
            }



        }
    }
}
